# Hydrometric

> AI-native UK flood hydrology platform replacing WINFAP, ReFH2 and the FEH Web Service. FEH2025 statistical method verified against WINFAP 5; all calculations run on the frozen NRFA Peak Flow Dataset, never the live NRFA API.

## For agents

- [agents.txt](https://www.hydrometric.io/agents.txt): MCP endpoint, auth, tool list, limits
- [MCP endpoint](https://www.hydrometric.io/api/mcp): Streamable HTTP, Bearer hm_live_ key
- [Claude Code skill](https://www.hydrometric.io/agent/SKILL.md): connect and run a gauged assessment
- [Get an API key](https://www.hydrometric.io/waitlist)

## Tools

- search_stations: Search the frozen NRFA Peak Flow Dataset by id, river or location. Free.
- get_station: Descriptors, record length, suitability for one station. Free.
- run_gauged_assessment: Full default-route FEH2025 assessment for a gauged station. 1 credit (free on cache hit).
- run_ungauged_assessment: FEH statistical estimate from descriptors + BNG location. 1 credit.
- get_qmed: Recommended QMED (m³/s) view over a cached run.
- get_growth_curve: Adopted growth curve + pooling summary over a cached run.
- get_design_flows: Design flows (m³/s) by return period over a cached run.
- get_report: FEH report as Markdown; PDF/DOCX as signed-in URLs.
- list_saved_analyses: The caller's saved analyses. Read-only.
- get_saved_analysis: One saved analysis, adopted route resolved. Read-only.
- get_catchment_map: Map figures for a station from the caller's saved analyses.
- run_method_space: Method Space: every method-valid variant of an analysis (station, saved analysis or descriptors) — P10/P50/P90 + FSE per metric, named variants, compare your numbers, qmedRoute filter (all|amax|descriptors), PNG figure. £20 per run credit (free re-run of a paid analysis; admins/grantees exempt).
- get_method_space_credits: Method Space credit balance + purchase URL. Free.

## Method notes

- QMED: SM2025 (Kjeldsen et al. 2025) descriptor equation with donor transfer and urban adjustment; AMAX median where the record allows.
- Growth curve: pooling group by similarity distance, GLO/GEV/PE3/KAP fits, GoF-led adoption.
- Default return periods: 2, 5, 10, 20, 30, 50, 75, 100, 200, 1000 years.
- Climate change: UKCP18 EA allowances (England river basin districts).